超声波传感器原理图和信息

很完整的门禁系统原码，希望能帮助大家更好的学习学习一下

44B0＋SL811，学习USB编程的好资料，强烈推荐-44B0+ SL811, learning programming USB good information, strongly recommended

lcd1602 含仿真 很好的应用实例 看过即会-lcd1602 with a good simulation of application examples will be seen that the

LED段码计算工具，增加了方便的功能 NEW-LED terms of the Code, to increase the convenience function NEW

此为锁相环函数发生器 包括键盘扫描程序 频率显示程序 波形显示程序-This is the phase-locked function generators including the keyboard scanner frequency waveform display shows process procedures, etc.

HE48R/E05A 实现I/O模式的工作原理-HE48R/E05A realize I/O model of principle

S12887实时时钟芯片中文资料.-S12887 real-time clock chip Chinese data.

AVR单片机使用U-IP库的例子，U-IP是一个简化的TCP/IP协议包，希望对有网络编程的嵌入式开发爱好者有用-AVR single-chip U-IP library to use the example, U-IP is a simplified TCP/IP protocol packets, and they hope to have network programming embedded development enthusiasts useful

液晶1602的硬件设计通过单片机pic16f877和液晶相连.实现每按一次按键.加一的功能.带电路图-The hardware design of LCD 1602 and LCD connected through the microcontroller pic16f877 to achieve every time I press the button. Plus-one function. With a circuit

MCS51外部中断1和定时器T0的应用，外部中断1连接一个按键，通过调节按键改变定时器的值，定时器输出连接一个蜂鸣器-MCS51 and one external interrupt timer T0 applications, external interrupt 1 to connect a button, through the adjustment button to change the timer value, the timer output to connect a buzzer